Keyboard structures of electronic musical instruments

Details Keyboard structures of electronic musical instruments Keyboard structures of electronic musical instruments

1981-12-24

1985-04-16

Franklin, Lawrence R.

Music

Instruments

General features

84439, G10C 312

Patent

active

045108390

ABSTRACT:
A keyboard of an electronic musical instrument is constituted by a plurality of keys and a keyboard frame. The keys are juxtaposed on the keyboard frame to be tiltable in the vertical direction. Between each key and the keyboard frame, there are provided a key return spring, a key return spring engaging member and an upper limit stop member for each key. The key return spring engaging member is fitted to either one of the keyboard frame and each key. One end of the key return spring engages the key return spring engaging member, while the other end engages either one of the each key and the keyboard frame. The upper limit stop member is disposed adjacently to key return spring and limits a returning tilting motion of each key caused by the key return spring. This adjacent disposition of key return spring and the upper limit stop member prevents bending of the keyboard frame and also makes it easy to adjust the touch and the alignment of the keys.

REFERENCES:
patent: 721706 (1903-03-01), Huseby
patent: 1840712 (1932-01-01), Grant
patent: 2228141 (1941-01-01), Magnante
patent: 2612812 (1952-10-01), Greenleaf et al.
patent: 3026760 (1962-03-01), Fauser
patent: 3499971 (1970-03-01), Ohno
patent: 3654831 (1972-04-01), Grilli et al.
patent: 3663738 (1972-05-01), Nakada
patent: 3835235 (1974-09-01), Amano
patent: 3935784 (1976-02-01), Koepke

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